From 9c22441e133814be5adb7770b0e77718e7909c9a Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Sat, 18 Jan 2020 15:30:36 -0500
Subject: [PATCH] added BPF error text

---
 afsk/main.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/afsk/main.c b/afsk/main.c
index 2817b26e..9cd58682 100644
--- a/afsk/main.c
+++ b/afsk/main.c
@@ -270,7 +270,10 @@ int main(int argc, char *argv[]) {
   pinMode (3, INPUT);
   pullUpDnControl (3, PUD_UP);
 
-  printf("Reading: %d\n", digitalRead(3));
+  if (digitalRead(3) != 0)
+  {
+	  printf("Band Pass Filter not present, so no transmit possible\n");
+  }
 
   digitalWrite (0, HIGH);
   digitalWrite (2, LOW);